public void Test_PreOrderTraversal_Root_Has_1_Child()
{
//Given
var tree = new BinaryTreeCollection <int>();
//When
tree.Add(4);
tree.Add(2);
//Then
Assert.Equal(new[] { 4, 2 }, tree.PreOrderTraversal());
}
public void Test_PostOrderTraversal_Root_Has_1_Right_Child()
{
//Given
var tree = new BinaryTreeCollection <int>();
//When
tree.Add(4);
tree.Add(6);
//Then
Assert.Equal(new[] { 6, 4 }, tree.PostOrderTraversal());
}
public void Test_InsertChild_Should_Add_2_Children_To_Root()
{
//Given
var tree = new BinaryTreeCollection <int>();
//When
tree.Add(4);
tree.Add(2);
tree.Add(5);
//Then
Assert.Equal(new[] { 4, 2, 5 }, tree.PreOrderTraversal());
}
public void Test_InOrderTraversal_Root_Has_2_Children()
{
//Given
var tree = new BinaryTreeCollection <int>()
{
4
};
//When
tree.Add(2);
tree.Add(5);
//Then
Assert.Equal(new[] { 2, 4, 5 }, tree.InOrderTraversal());
}
public void Test_PreOrderTraversal_Tree_Has_1_Node()
{
//Given
var tree = new BinaryTreeCollection <int>();
//When
tree.Add(4);
//Then
Assert.Equal(new[] { 4 }, tree.PreOrderTraversal());
}
public void Test_AddMethod_Should_Throw_Exception_When_Value_Is_Already_In_Tree()
{
//Given
var tree = new BinaryTreeCollection <int>(2)
{
2,
0,
3,
};
//When
var exception = Assert.Throws <InvalidOperationException>(() => tree.Add(2));
//Then
Assert.Equal("Tree cannot contain duplicates! ", exception.Message);
}
public void Test_Remove__Element_Is_Leaf_Should_Use_Empty_Spaces_At_Next_Addition()
{
//Given
var tree = new BinaryTreeCollection <int>(3)
{
3,
5,
6,
7,
8,
9
};
//When
tree.Remove(8);
tree.Add(8);
Node <int> foundNode = tree.FindNode(8);
//Then
Assert.Equal(new[] { 7, 8, 9 }, foundNode);
}
public void Test_InsertChild_Should_Correctly_Add_Elements_Repeatedely_As_Right_Children()
{
//Given
var tree = new BinaryTreeCollection <int>();
//When
tree.Add(1);
tree.Add(2);
tree.Add(3);
tree.Add(4);
tree.Add(5);
tree.Add(6);
//Then
Assert.Equal(new[] { 1, 2, 3, 4, 5, 6 }, tree.InOrderTraversal());
Assert.Equal(6, tree.Count);
}
public void Test_InsertChild_Should_Correctly_Add_Elements_Repeatedely_As_Left_Children()
{
//Given
var tree = new BinaryTreeCollection <int>();
//When
tree.Add(10);
tree.Add(9);
tree.Add(8);
tree.Add(7);
tree.Add(6);
tree.Add(5);
//Then
Assert.Equal(new[] { 5, 6, 7, 8, 9, 10 }, tree.InOrderTraversal());
Assert.Equal(6, tree.Count);
}